A small plane crashed into a home and damaged others in Gaithersburg, Md. on Monday.  At least three people that were on the plane died and officials say that three people on the ground are missing. A fourth person may have been on board, but no names have been released. There have not been any other injuries reported related to the fires. No other information has been released about the three residents who were in the home. Another press conference with more information will be held Monday afternoon.

The morning crash set several houses on fire, damaging two and destroying another, less than a mile from the Montgomery County Airpark, according to LA Times. County fire spokesman Pete Piringer said that the corporate jet, registered to Sage Aviation of Chapel Hill, N.C.,appeared to be heading there.

Montgomery Fire Chief Steve Lohr said that the National Guard Armory reported the explosion at about 10:45 a.m. and units arrived on the scene seven minutes later. Crews put out the fires, shut off the utilities and searched for anyone inside the home. The first floor of the two-story house was completely blown out and smoke rose from a giant hole in the collapsing roof.

Investigators claim that it is too soon to know what went wrong with the plane. According to a report by USA Today, radio traffic just before the crash talked about birds being nearby, which can get into a plane’s engine and cause it to stall. Several eye witnesses told reporters that the plane appeared to be wobbling and struggling to maintain its altitude before the crash.

A witness who lived close to the crash site, 67-year-old Fred Pedreira, saw the plane as he was returning home from the grocery store and instantly knew that something was wrong. He told The Associated Press that he thought the plane was coming in too low for a jet with the wheels already down. He claimed that the jet quickly went sideways and crashed “belly-up” into the home. He said he “got goosebumps” when he realized that there were people in the plane and he “hoped no one was in the home.”

Another witness who lived two houses away from the house the plane hit, 22-year-old Emily Gradwohl, ran outside to see what was happening and saw the house on fire.  She said she heard a “loud crash” and the explosion shook her home. Gradwohl added that planes fly low near her neighborhood frequently and she has never worried about one crashing until today.

A nearby resident who is also used to frequently hearing planes overhead, Jocelyn Brown, said that she heard a “sputtering sound” at first. Then, three explosions followed a “crash” and a “boom.”  She added that people thought it was gas lines, according to USA Today.

The National Transportation Safety Board is responsible for the investigation and they have an investigator at the scene. Crash investigations can typically take months to complete. A former National Transportation Safety Board chair Mark Rosenker says that there is enough cockpit and engine evidence among the wreckage to complete a thorough investigation.